Unintended Consequences
Law of Unintended Consequences
The things that happen as a result of some action, which were not necessarily anticipated — which could possibly be an unexpected benefit, an unexpected drawback, or even a backfire against the original action.
Origin
The first systematic analysis appeared in sociologist Robert K. Merton's 1936 article "The Unanticipated Consequences of Purposive Social Action". Merton identified five sources: ignorance, error, the "imperious immediacy of interest" (wanting an outcome so badly that one ignores side effects), basic values (where actions paradoxically undermine themselves), and self-defeating predictions (where publicizing a prediction changes the outcome). Merton's work established unintended consequences as a foundational concept in sociology.